Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Summary of Changes In Estimated Fair Value of Level 3 Financial Assets (Details)

v3.20.4
Fair Value Measurements - Summary of Changes In Estimated Fair Value of Level 3 Financial Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Changes in the estimated fair value of Level 3 financial assets    
Balance at beginning of period $ 681 $ 392
Change in fair value 1,012 289
Balance at end or period $ 1,693 $ 681